Denon-DCD685-cd-sm维修电路原理图.pdf

B SERVICE MANUAL Some illustration using in this service manual is slightly from the actual set. MODEL DCD-485/685 STEREO CD PLAYER DCD-485 DCD-685 Hi-Fi Component RadioFans.CN 收音机爱 好者资料库 2 SAFETY PRECAUTIONS SPECIFICATIONS SAFETY PRECAUTIONS The following check should be performed for the continued prtection of the customer and service technician. LEAKAGE CURRENT CHECK Before reterning the unit to the customer,make sure you make either (1) a leakage current check or (2) a line to chassis resistance check. If the leakage current exceeds 0.5 miliamps, or if hte resistance from chassis to either side of the power cord is less than 460 kohms, the unit is detective. AUDIO DCD-485 DISCS REMOTE CONTROL UNIT FUNCTIONS AND DISPLAY GENERAL CHARACTERISTICS 434 (W) x 100 (H) x 285 (D) mm 2 channels Dimensions: 54.5 (W) x 140 (H) x 24.8 (D) mmExternal Dimensions: Number of Channels: Automatic searchi, programmed playback, repeat playback, manual search, auto space, time mode, auto edit, dimmer, random playback, pitch control (DCD-685 only) Functions: Remote Control System: Track number, time, music calendar and engaged modesDisplay: Headphones jack Infrared pulse system RC-266 Others: Mass:3.4 kg Mass:85 g including batteries AC 230 V, 50 Hz Power Supply: 3V DC; two R6P (standard size AA) dry cell batteriesPower Supply: Power consumption:11 W 2 to 20 kHzFreqency Responese: 0.2 to 2.0 VOutput Voltage: 98 dB 105 dB Dynamic Range: Signal to Noise ratio: 0.003 % (1 kHz) Harmonic distortion: 102 dB (1 kHz) Separation: Below measurable limit: Compact Disc format ( 0.001% W. peak) 3.6 kg 12 W 100 dB 110 dB 103 dB (1 kHz) Wow and Flutter: Specifications and design are subject to change without notice for purpose of improvement. SPECIFICATIONS DCD-685 RadioFans.CN 收音机爱 好者资料库 3 DISASSENBLY (Follow the procedure below in reverse order when reassembling) 1. Top Cover1. Top Cover 1. Remove 4 screws 1 on both sides. 2. Remove 2 screws 2 on the Rear Panel. 3. Detach the Top Cover as shown in the fig. 2. Front Panel2. Front Panel 1. Remove 1 screw 3 on the Rear Panel and 1 screw 4 fixing Support Bracket (b). (only DCD-485) 2. Take off the Mecha Cover after removing 2 screws 5 . Open the Tray by turning the Gear (a) clockwise, then detach the Loader Panel. 3. Remove 3 screws 6 on the bottom edge of the Front Panel. 4. Remove 2 screws 7 , at L/R ends of the Front Panel and 1 screw 8 fixing Phone P.W.B. Support Bracket 4 4. Main P.W.B.4. Main P.W.B. 1. Remove 5 screws 10, 5 screws 11 on the Rear Panel and detach it. 2. Remove 3 screws 12 fixing the Main P.W.B. 3. Unfasten 1 P.W.B. Holder to detach the Main P.W.B. 4. Remove 1 screw and 2 screw fixing the Power P.W.B. 5. Unfasten 1 P.W.B. Holder to detach the Power P.W.B. 3. CD Mecha. Unit3. CD Mecha. Unit 1. Remove 4 screws 9 fixing the CD Mecha. 2. Unplug Connectors (b), (c) and FFC from each socket. 3. Release the FFC from the Clamper. 5 CD TEST MODE ? Setting of the test mode How to start the test mode: Turn on the power in the condition that CLOSE (Pin No. 3 ) and OPEN (Pin No. 4 ) of CX053 are being shorted. ( “01” is indicated on the DISPLAY) To exit from the test mode, turn off the power. (Refer to Fig. 1 “Test Point Layout”) Fig. 1 “Test Point” Layout * Laser light of the pickup is always emitted regardless of DISC loading in the test mode. You may lose your eyesight if you look into the laser directly. So be careful enough when operating in the test mode. ? Used DISC: A-BEX TCD784 ? Explanation of each button * Use only the buttons described below for operations while in the test mode, and dont push any other buttons. Names of buttonsOperation OPEN / CLOSE * Loads or unloads DISC PLAY * Emits laser light * Repeats search operation (No DISC condition: While its pressed) * Actuates focus servo (In case of DISC loaded) * Actuates tracking servo STOP * Stops operation PAUSE * Performs auto adjustment MANUAL SEARCH FORWARD / REVERSE * Moves pickup 6 ? How to check the test mode ( 1 ) DISC discrimination, adjustment * Insert DISC, and press the PAUSE button. * “06 Adj” is displayed, and discrimination of DISC size 8 cm/12 cm, discrimination of DISC reflectance (CD, CD-R/CD-RW), adjustment of focus, tracking offset, and EF balance will be performed. (Adjusted values are not displayed: Refer to Fig. 2, 3) Fig. 2 DISC discrimination, adjustment Fig. 3 (Case of CD-RW) Adjustment of EF balance * After completing the discrimination and adjustment, it becomes stop condition. * Once discrimination of DISC has been carried out in the “06 Adj” mode, discrimination of size and reflectance is no longer made, and only adjustment will be performed. ( 2 ) Checking of servo state * Press the PLAY button after performing above (1) “DISC discrimination, adjustment”. * “02 L on” is displayed, and the laser will start to light. (The pickup may vibrate with a rattling noise if DISC has been loaded, but this is not abnormal.) * Press the PLAY button again. * “03 F on”is displayed. DISC starts turning,and focus servo will be actuated. (Refer to Fig. 4, 5) FEO TEO HF DRF TEO TB SLD FEO TEO TEO HF 7 Fig. 4 In “03 F on” Fig. 5 In “03 F on” * Press the PLAY button again. * “04 t on” is displayed. Tracking, CLV, and slide servo will be actuated. * Monitor HF signal using the test terminals, HF of CX053 (Pin No. 1 ) and VC of CX063 (Pin No. 5 : 2.5V ref. signal). Check that the signals amplitude is 1.5V?0.3Vp-p. (Refer to Fig. 6) Fig. 6 In “04 t on” A ( A = 1.5 0.3 VP-P ) HF 8 Wave-forms of each point SPD SPD FEO TEO DRF HF SLD TEO SLD OPEN CLOSE SPD SPD TD TEO HF DRF SLD TEO FD When 12 cm DISC start When 8 cm DISC start When focus servo on Track search (when forward) During PLAY When the tray OPEN When 12 cm DISC stop When 8 cm DISC stop During PAUSE Track search (when reverse) Focus search (no DISC) 9 BLOCK DIAGRAM DCD-685 on y DCD-485 on y DCD-685 on y RW SW FOCUS CO L Drv TRACK NG CO L Drv SL DE Mtr Drv SP NDLE Mtr Drv LOAD NG Mtr Drv LA6995 C104 P CK UP FOCUS CO L TRACK N CO L M SL DE M SP NDLE M LOAD NG L D ODE CD MECHA KSL-2130CCM NMOST-SW OPEN-SW CLOSE-SW ASP LA9241M C101 DSP LC78625E C102 H/P AMP C315 DAC PCM1702 C602/603 D F LTER SM5841BS C703 -COM PD78044F C201 1U-3346-1 MAIN UNIT MUTE MUTE DRF SL SUB CODE CD/RW A/D NPUT FSEQ KEY MATR X VFD FL601 REMOTE SENSOR C702 OPTOUT 1U-3346-4 H/P UN T COTROL BUS 1U-3346-3 D SPLAY V R 1U-3346-2 POWER UN T ROTALY ENCODER S616 CY271 CX271 8V -HB +VDD CONTROL XRST2 DF&DAC PCM1735 C105 VCO TC9246F C108 XRST1 D.MUTE MD2 LD ON POWER CONT M5290P C501 POWER TRANS PT501 AC NLET POWER SW 1U-3346-5 5V RESET MUTE CONTROL PLL BU2616F C107 CONTROL DRVMUTE 10 NOTE FOR HANDLING OF LASER PICK-UP Description of the Components Description of the Components Label Label Pin Connector Pin Connector year (last figure) daymonthquality control No. Lot No. lop No. Oct. Nov. and Dec. are expressed by alphabetical letters of X, Y and Z. 101101 LD drive currentquality control The expressed unit is by mA, with omission of the decimal point as for example, 56.5mA will be ex- pressed as 565, but the head of English letter means the control in the manufacturning plant. Pin No.DescriptionIN/OUT 1PD ICVcIN 2VccIN 3EOUT 4DOUT 5AOUT 6BOUT 7COUT 8FOUT KSS- 213CKSS- 213C Lot No. lop Lot No. lop Slide rack OP Slide base Object Lens Actuator cover PAL-2 Flexible board Label Flexible flat cable connector Z-axis Y-axis (Tangental direction) X-axis (Radial direction) +Z-axis direction +X-axis direction +Y-axis direction 13579 11 13 15 246810 12 14 16 KSS-213C Flexible flat cable connector Pin No.DescriptionIN/OUT 9GNDIN 10LDLDIN 11VRIN 12PDOUT 13FCS(+)IN 14TRK(+)IN 15TRK()IN 16FCS()IN LD PDIC 14131211109876543211615 TRACKING LDPDIC +2.5V+5V SHORT LAND FOCUSING CAUTION: CAUTION: The soldered connecting portion must be bridged when removing CX161. 11 Caution for Handling the Laser Pick- up Caution for Handling the Laser Pick- up The laser pick-up KSS-213C is assembled and precisely adjusted using a sophisticated manufacturing process in our plant. Do not disassemble or attempt to readjust it. Please observe the following instructions carefully in handling the pick-up. 1. Handle with Care1. Handle with Care (1) Storage Do not store the pick-up in dusty, high-temperatured or high-humidity environments. (2) Please take care for preventing from shock by falling down or careless handling. 2. Laser Diode (LD)2. Laser Diode (LD) (1) Protect your eyes The laser beam may damage the human eye, since the intensity of the focused spot may reach 7103 W/cm2 even if the intensity at the objective lens is 400W maximum. As the light beam spreads after focused through the objective lens, it does not effect you in the place as far as more than 30 cms. However, do not look at the laser light beam either through the objective lens directly nor another lens or a mirror. (2) Poison of As Since the LD chip contains As (Arsenic), as GaAs + GaAlAs, as known as the poison, although the poison is relatively weak, in comparing with others, e.g. As2O3, AsCl3 etc., and the amount is small, avoid putting the chip in acid or an alkali solution, heating it over 200 C or putting it into your mouth. (3) Avoid surge current or electrostatic discharge The LD may be damaged or deteriorated by its own strong light if a large current is supplied to it, even if only a short pulse. Make sure that there is no surge current in the LD driving circuit by switches or else. Be careful to handle pick-up as it may be damaged in a moment by human electrostatic discharge. The pins of the LD are short- circuited by solder for protection during shipment. For safety handling of an LD, grounding the human body, measuring equipments and jig is strongly recommended. And still it is further desirable to make use of mat on the platform and floor for handling the LD. To open the short-circuit, remove the soldering quickly with a soldering iron whose metal part is grounded. The temperature of the soldering iron should be less than 320C (30W). 3. Actuator3. Actuator (1) The performance of the actuator may be affected if magnetic material is located nearby, since the actuator has a strong magnetic circuit. Do not permit dust to enter through the clearance of the cover. (2) Cleaning the lens It may change the specifications by attaching dust or ash on the objective lens. Clean the lens with a cleaning paper dampened with, not pressing lens with so much strength by the cleaning paper. 4. Metal Bearing4. Metal Bearing As the metal bearing of Cu-compound sintered alloy is impregnated with FROIL946P, never fail to supply the bushing with the same lubricant at the time of replacing the pick-up. 5. Handling5. Handling Please handle the laser pick-up with holding the slide base. (resin molded part). When either a part of human body or some other things may happen to touch directly with the circuit part of P.W.Board, it may cause deterioration, take careful attention in handling this base. 6. Deterioration6. Deterioration As KSS-213C comprises built-in RF Amp and APC circuit, resists stronger against external electrostatic damages than the former typed pickup. However, there is possibility of pickup deterioration in the following cases. (1) Low HF level, or with great numbers of jitters. (2) Tracking offset (EF Balance) is out of order (Refer to “Confirmation Method of Adjustment”for confirmation (1) and (2). 12 SEMICONDUCTORS PD78044FGF- 188- 3B9 (IC601)PD78044FGF- 188- 3B9 (IC601) 1 24 25 4041 64 65 80 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 12345678910 11 12 13 14 15 16 17 18 19 20 21 22 23 24 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 PD78044FGF-188-3B9 P113/FIP21 P112/FIP20 P111/FIP19 P110/FIP18 P107/FIP17 P106/FIP16 VLOAD P105/FIP15 P104/FIP14 P103/FIP13 P102/FIP12 P101/FIP11 P100/FIP10 P197/FIP9 P196/FIP8 P195/FIP7 P33/TI1 P34/TI1 P35/PCL P36/BUZ P37 X2 X1 Vss XT2 P04/XT1 AVRES AVDD P10/AN10 P11/AN11 P12/AN12 P13/AN13 P114/FIP22 P115/FIP23 P116/FIP24 P117/FIP25 P120/FIP26 P121/FIP27 P122/FIP28 P123/FIP29 P124/FIP30 P125/FIP31 P126/FIP32 P127/FIP33 VDD P70 P71 P72 IC (Vpp) POO/INTPO/T10 PO1/INTP1 PO2/INTP2 P03/INTP3/C10 P31/TO0 P31/TO1 P32/TO2 P94/FIP6 P93/FIP5 P92/FIP4 P91/FIP3 P90/FIP2 P81/FIP1 P80/FIP0 V DD P27/SCK0 P26/SO0/SB1 P25/SIO/SBO P24/BUSY P23/STB P22/SCK1 P21/SO1 P20/SI1 REST P74 P73 AVss P17/AN17 P16/AN16 P15/AN15 P14/AN14 1P94/FIP6NCOCHzNot used (Open) 2P93/FIP56GOCHzLHP. DVFD grid 6G (EMPHASIS, PLAY, PAUSE,REPEAT) 3P92/FIP45GOCHzLHP. DVFD grid 5G (1120, A B, PROG, ) 4P91/FIP34GOCHzLHP. DVFD grid 4G (110) 5P90/FIP23GOCHzLHP. DVFD grid 3G (Seconds Digit, S, SINGLE) 6P81/FIP12GOCHzLHP. DVFD grid 2G (Minutes Digit, M, TOTAL) 7P80/FIP01GOCHzLHP. DVFD grid 1G (Track No., A.SPACE) 8VDDVDDPositive power (Connect to +5V) 9P27/SCK0MCKOBHzHP. UPSM5841/PCM1735/BU2616 mode control clock output 10P26/S00/SB1MDTOBHzP. UPSM5841/PCM1735/BU2616 mode control data output 11P25/SI0/SB0NCIBHzP. DGNot used (Connect to GND) 12P24/BUSYNCIBHzP. DGNot used (Connect to GND) 13P23/STBMLEOBHzP. UPSM5841/PCM1735 mode control latch output 14P22/SCK1CQCKOBHzDSP, ASP Command clock & SUBQ readout clock output 15P21/SO1COINOBHzDSP, ASP Command data output 16P20/SI1SUBQIBHzDSP sub code Q data input 17RESETRESETILReset signal input 18P74NCIBHzP. DGNot used (Connect to GND) 19P73XTALOBHzHLP. UPTC9246XTAL MODE change Lo:ON (Pitch 0),Hi:OFF(Variable pitch) 20AVssAVssGND for A/D converter 21P17/ANI7DSP XRSTOBHzLLP. DGDSP reset signal output 22P16/ANI6DF XRSTOBHzLLP. DGDigital filter reset signal output 23P15/ANI5JOG BIBHzP. UPRotaly encoder JOG B input 24P14/ANI4JOG AIBHzP. UPRotaly encoder JOG A input 25P13/ANI3AD3IBHzAP. UPKey data input 3 (A/D) 26P12/ANI2AD2IBHzAP. UPKey data input 2 (A/D) 27P11/ANI1AD1IBHzAP. UPKey data input 1 (A/D) 28P10/ANI0AD0IBHzAP. UPKey data input 0 (A/D) 29AVDDAVDDA/D converter analog power (Connect to +5V) 30AVREFAVREFIA/D converter Ref. V input (Connect to +5V) Pin No. TerminalPortI/OTypRstIniActExtFunction PD78044FGF- 188- 3B9 Terminal FunctionPD78044FGF- 188- 3B9 Terminal Function ICs ICs 13 Pin No. TerminalPortI/OTypRstIniActExtFunction 31P04/XT1NCIAP. DGNot used (Connect to GND) 32XT2NCNot used (Open) 33VssGNDGND 34X1X1IAMain system clock input 35X2X2Main system clock input 36P37MCSOBHzHLP. DGPCM1735 chip select output 37P36/BUZMCEOBHzLLBU2616 chip enableoutput 38P35/PCLRWCOBHzLLDSP read / write control output 39P34/TI2SL+OBHzLHASP sled drive signal output 40P33/TI1SLOBHzLHASP sled drive signal output 41P32/T02NCIBHzP. DGNot used (Connect to GND) 42P31/T01CD/RWOBHzHLP. DGCD / RW Gain change output 43P30/T00SEARCHOBHzLHP. DGServo control output at search 44P03/INTP3/CI0REMOCONIBHzRemote control signal input 45P02/INTP2WRQIBHzLHDSP SUBQ output standby input 46P01/INTP1DRFIBHzLHASP DEFECT RF level detect input 47P00/INTP0/TI0NCIAHzP. UPNot used (Connect to GND) 48